WO2011139082A2

WO2011139082A2 - Method and apparatus for aperiodically transmitting and receiving a sounding reference signal

Info

Publication number: WO2011139082A2
Application number: PCT/KR2011/003321
Authority: WO
Inventors: 서성진; 권기범; 홍성권
Original assignee: (주)팬택
Priority date: 2010-05-03
Filing date: 2011-05-03
Publication date: 2011-11-10
Also published as: WO2011139082A3

Abstract

The present invention relates to a method and apparatus for aperiodically transmitting and receiving a sounding reference signal. The method for aperiodically receiving a sounding reference signal, performed by a base station, according to one embodiment of the present invention comprises: determining a first transmission range of an aperiodic sound signal of first user equipment, a second transmission range which overlaps with the first transmission range and allows second user equipment to transmit a demodulation reference signal, data or a periodic sounding reference signal, and a third transmission range which overlaps with the first transmission range and allows third user equipment to transmit a demodulation reference signal; generating a first instruction for instructing the first user equipment to transmit an aperiodic sounding reference signal in the first transmission range; generating a second instruction for instructing the second user equipment to puncture or hold a signal containing data or a periodic sounding reference signal, if either signal is transmitted in the second transmission range; transmitting the first instruction to the first user equipment, and transmitting the second instruction to the second user equipment; and receiving, in the first transmission range, the aperiodic sounding reference signal from the first user equipment.

Description

Aperiodic transmission and reception method of sounding reference signal

The present invention relates to a wireless communication system, and more particularly, to provide an aperiodic transmission and reception method and apparatus for a control signal for estimating a channel state of a resource in a wireless communication system.

As communication systems have evolved, consumers, such as businesses and individuals, have used a wide variety of wireless terminals.

In the current wireless communication systems such as 3GPP, Long Term Evolution (LTE), LTE-A (LTE Advanced), etc., it is a high-speed large-capacity communication system that can transmit and receive various data such as video, wireless data, etc. In addition to the development of technology capable of transmitting large amounts of data comparable to wired communication networks, proper error correction and detection methods are essential to improve system performance by minimizing the reduction of information loss and increasing system transmission efficiency. It is becoming.

In addition, the current wireless communication system uses various control signals to provide information on the communication environment to the other device through uplink or downlink, and as an example of the control signal, a reference signal (Reference) Signal, or reference signal) are discussed.

For example, in the LTE system, a user equipment (terminal, or 'UE') during uplink transmission is a sounding reference signal (SRS) as a channel estimation reference signal indicating a channel state. Send to the base station. Meanwhile, the base station transmits a cell-specific reference signal (CRS), which is a reference signal, to the terminal every subframe in order to identify channel information during downlink transmission.

Recently, however, a discussion has been made to transmit a channel estimation reference signal aperiodically due to flexibility of a communication system, but a specific method thereof has not been determined. In consideration of such a situation, a specific transmission scheme of the aperiodic channel estimation reference signal is required.

An embodiment of the present disclosure provides an apparatus and method for transmitting and receiving a control signal for estimating a channel state of a terminal in a wireless communication system.

In addition, an embodiment of the present disclosure provides an apparatus and method for aperiodic transmission and reception of a sounding reference signal for estimating a channel state of a terminal in a wireless communication system.

In addition, an embodiment of the present disclosure provides a transmission and reception apparatus and method for minimizing collision with other reference signals in the entire bandwidth when using the entire bandwidth to aperiodically transmit a sounding reference signal in a wireless communication system. .

In addition, an embodiment of the present disclosure, in a wireless communication system, transmits a sounding reference signal aperiodically over the entire bandwidth, and transmits a signal in an unused bandwidth to reduce a transmission time, or a bandwidth used Provided are a transmitting and receiving device and a method which can be superimposed on a packet.

In addition, an embodiment of the present disclosure provides a technique for transmitting and receiving aperiodic sounding reference signals that minimizes interference with other reference signals in a wireless communication system.

In addition, an embodiment of the present disclosure provides an apparatus and method for signaling information instructing to transmit a sounding reference signal by minimizing interference with another reference signal in a communication system.

In order to implement the above-described problem, a non-periodic reception method of the sounding reference signal according to an embodiment of the present specification is a base station is a first transmission region, the first transmission region and the aperiodic sounding signal of the first user terminal and A second transmission area that overlaps and the second user terminal transmits a demodulation reference signal, transmits data, or transmits a periodic sounding reference signal, and a third user terminal that overlaps the first transmission area and the demodulation reference Determining a third transmission area for transmitting a signal, generating first indication information instructing the first user terminal to transmit an aperiodic sounding reference signal in the first transmission area, and the second user terminal When a signal including data or a periodic sounding reference signal is transmitted to the second transmission area, the signal is punctured or held. Generating second indication information indicating lock indication, transmitting the first indication information to the first user terminal, transmitting the second indication information to the second user terminal, and from the first user terminal Receiving an aperiodic sounding reference signal in the first transmission region.

According to another exemplary embodiment of the present disclosure, a method for aperiodic transmission of a sounding reference signal may include receiving, by a user terminal, indication information from a base station, and transmitting the aperiodic sounding reference signal for a predetermined frequency band and time. In the case of the first indication information indicating that, the aperiodic sounding reference signal is transmitted during the frequency band and the time, and the indication information indicates puncturing or holding a signal including data or a periodic sounding reference signal. In the case of the second indication information, puncturing or holding the signal.

In another embodiment of the present disclosure, an aperiodic reception apparatus for a sounding reference signal may include a base station overlapping a first transmission region and a first transmission region of an aperiodic sounding signal of a first user terminal. A second transmission area for transmitting a demodulation reference signal, a data transmission, or a periodic sounding reference signal, and a third transmission in which a third user terminal transmits a demodulation reference signal and overlaps the first transmission area. A determination unit for determining an area, generating first indication information for instructing the first user terminal to transmit an aperiodic sounding reference signal in the first transmission area, and for the second user terminal in the second transmission area Second indication information instructing to puncture or hold the signal when transmitting a signal including data or a periodic sounding reference signal. An instruction information generating unit and the first instruction information to the first user terminal, and transmits the second instruction information to the second user terminal from the first user terminal in the first transmission area. And a transceiver for receiving an aperiodic sounding reference signal.

Device for aperiodic transmission of a sounding reference signal according to another embodiment of the present disclosure A transceiver for receiving a radio signal from a base station by a user terminal, the aperiodic sounding reference signal for a predetermined frequency band and time from the received radio signal An instruction information extracting unit for extracting first instruction information for instructing to transmit or second instruction information for puncturing or holding a signal including data or a periodic sounding reference signal, and an instruction extracted by the instruction information extractor When the information is the first indication information, includes a non-periodic sounding signal generation unit for generating an aperiodic sounding reference signal to be transmitted during the frequency band and the time, wherein the transmission and reception unit is the first indication information Transmits the generated aperiodic sounding reference signal, and the indication information indicates a second indication If shown, the signals or the periodic sounding reference signal, including the data characterized in that the puncturing or holding.

1 illustrates a wireless communication system to which embodiments of the present invention are applied.

2 illustrates a subframe and time slot structure and a time-slot structure of transmission data applicable to an embodiment of the present invention.

3 is a diagram illustrating an example of periodic SRS (Periodic SRS) transmission to which the present embodiment can be applied.

FIG. 4 is a diagram illustrating a one-shot scheme as an example of an aperiodic SRS.

5 is a diagram for transmitting an aperiodic SRS using a demodulation reference signal (DM-RS) according to an embodiment of the present specification.

6 is a diagram for transmitting an aperiodic SRS in the PUSCH region according to an embodiment of the present specification.

FIG. 7 is a diagram illustrating aperiodic SRS transmission by combining an SRS using a DM-RS and an SRS using a PUSCH region according to an embodiment of the present specification.

8 is a diagram for transmitting an aperiodic SRS using a DM-RS region and an existing SRS region according to another embodiment of the present specification.

FIG. 9 is a diagram illustrating an example of signaling transmitted to puncture or hold a PUSCH region or an existing SRS symbol used in FIGS. 7 and 8.

FIG. 10 is a diagram illustrating a process of transmitting an aperiodic SRS using DM-RS, which is layer 1, according to an embodiment of the present specification.

FIG. 11 is a diagram illustrating a process of transmitting an aperiodic SRS using DM-RS, which is layer 1, according to another embodiment of the present specification.

12 is a flowchart for instructing to avoid a collision with aperiodic transmission or aperiodic transmission of a control signal according to an embodiment of the present specification.

13 is a flowchart for receiving indication information instructing to avoid aperiodic transmission and collision of a control signal according to an embodiment of the present specification.

FIG. 14 is an apparatus block diagram for instructing to avoid collision with aperiodic transmission or aperiodic transmission of a control signal according to an embodiment of the present specification.

FIG. 15 is an apparatus block diagram for receiving indication information instructing to avoid aperiodic transmission and collision of a control signal according to an embodiment of the present specification.

FIG. 16 illustrates indication information for controlling SRS transmission using a 0 / 1A field of format 0 according to an embodiment of the present specification.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Referring to FIG. 1, the terminal 10 is a comprehensive concept of a user terminal in wireless communication. In the GSM as well as a UE in Wideband Code Division Multiple Access (WCDMA) and LTE, High Speed Packet Access (HSPA), etc. It should be interpreted as a concept that includes the MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), wireless device (wireless device). Hereinafter, the user terminal will be referred to as a UE.

The base station 20 generally refers to a station communicating with the terminal 10, and includes a node-B, an evolved node-B, an base transceiver system (BTS), and an access point. ) May be called in other terms, such as a relay node. A cell is meant to encompass all of the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, and relay node communication range.

Wireless communication systems include code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), OFDM-FDMA, OFDM-TDMA, and OFDM-CDMA. Various multiple access techniques can be used. The uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.

2 illustrates a subframe and time slot structure of a transmission data and a general structure of a time-slot applicable to an embodiment of the present invention.

One radio frame consists of ten subframes 210, and one subframe includes two

time slots

202 and 203. The basic unit of data transmission is a subframe, and downlink or uplink scheduling is performed in the subframe units. One time slot may include 7 or 6 OFDM symbols in the time domain and 12 subcarriers in the frequency domain.

For example, when having a normal cyclic prefix (CP), the time slot 202 may include seven long blocks (LB) 211. The time-frequency domain defined by one slot is called a resource block (RB). One radio frame is 10 ms and divided into 10 TTIs (transmission time intervals). Thus, the terms 'TTI' and 'subframe' may be used in the same sense.

Meanwhile, in the next-generation communication system according to the present invention, a demodulation reference signal (DM-RS) and a sounding reference signal (SRS) are used for uplink, and three reference signals (RS) are used for downlink. In addition, an MBSFN reference signal (Multicast / Broadcast over Single Frequency Network Reference Signal, MBSFN-RS) and a UE-specific reference signal (UE-specific reference signal) are defined. Here, the SRS functions as a pilot channel for an uplink channel.

Hereinafter, the present disclosure discloses an aperiodic transmission / reception scheme of a control signal. In particular, the channel estimation reference signal and the SRS are described as an example of the control signal, but the present invention is not limited to the SRS or the channel estimation reference signal. It should be understood as a concept including overall control signals used in uplink or downlink.

The SRS includes uplink channel information for the entire band (all subcarrier bands) including not only a band to be used by each UE but also a band that the UE may use.

Equation 1 below generates an SRS sequence, and the generated SRS sequence is transmitted according to a subframe configuration as shown in Table 1 after the resource mapping based on a predetermined criterion.

[Equation 1]

here,

Is the length of the reference signal sequence,

U is a PUCCH sequence group number, v is a base sequence number, and a cyclic shift (CS)

to be.

Is an integer value of one of 0 to 7, and is set for each UE by a higher layer.

TABLE 1

Table 1 is a subframe configuration table of the FDD SRS. Each format (srsSubframeConfiguration) is defined as 4 bits, and in each case, a transmission period and an offset of an actual transmission subframe are defined. That is, when the srsSubframeConfiguration value is 8 (1000 in binary), this means that the SRS is transmitted in the second and third subframes every five subframes.

3 shows an example of periodic SRS (Periodic SRS) transmission to which the present embodiment can be applied.

First, referring to Table 1, when srcSubframeConfiguration is 8, the configuration period is 5 subframes, and transmission offsets are 2 and 3. Accordingly, the SRS 310 may be transmitted in the last symbols of subframes # 2 and # 3 every five subframes. Here, the SRS may be transmitted in the last symbol of each subframe. For example, when one subframe consists of 14 symbols (in the case of Normal Cyclic Prefix), when the SRS is transmitted in the 14th symbol, and consists of 12 symbols (in the case of Extended Cyclic Prefix), SRS is transmitted in the 12th symbol. Of course, the position of the symbol in which the SRS is transmitted herein is not limited thereto. In other words, the SRS is periodically transmitted at each cell (base station) at a specific position of a radio frame or according to a transmission period.

Meanwhile, as the communication system evolves, the number of antennas increases, such as a multi-input multi-output antenna (MIMO), and the corresponding UE currently serves a serving cell (cooperative MultiPoint, CoMP). A communication system for transmitting and receiving a reference signal with a neighbor cell as well as a cell has emerged. Therefore, it is difficult to secure sufficient SRS transmission due to the periodic SRS transmission method, and it is necessary to extend the transmission of the SRS.

In this regard, the present specification is intended to increase the scheduling flexibility (Scheduling Flexibility) of the SRS by making it possible to adjust the SRS transmitted periodically, and to improve the SRS transmission accordingly. First, a single-shot SRS, an SRS via a DM-RS (Demodulation Reference Signal), an SRS using a PUSCH region, etc. will be described as an aperiodic SRS transmission scheme to which the present invention is applied.

4 is an example of transmitting aperiodic SRS of the one-shot method to which the present invention is applied.

Referring to FIG. 4, the numbers in each subframe 411, 412,..., 420 mean identification information of a UE transmitting an SRS in a corresponding frequency domain. UE # 1, UE # 2, UE # 3, and UE # 4 show periodic SRS transmission in the allocated frequency domain. Here, as the unique parameters set for each UE # 1, UE # 2, UE # 3, UE # 4 are different, each UE # 1, UE # 2, UE # 3, UE # 4 calculated from the unique parameters SRS transmission band of may be set differently.

Meanwhile, in

subframes

413 and 416, UE # 1 and UE # 3 transmit aperiodic SRS in one-shot. Thus, collision and transmission of periodic SRS can be avoided. Here, the non-periodic SRS may not be transmitted in a subframe in which the periodic SRS is not transmitted, and the aperiodic SRS may be transmitted in the subframe in which the periodic SRS is transmitted. When a specific UE transmits an aperiodic SRS through a subframe transmitted through the periodic SRS, the UE may be configured to transmit aperiodic SRS or periodic SRS according to a situation by giving priority.

In conclusion, according to the periodic SRS transmission, the UE # 1 is configured to transmit the SRS through the BW obtained by dividing the bandwidth (BW) of the entire system by 8 so that the entire BW may be sounded only when 8 SRSs are transmitted. However, through the one-shot aperiodic SRS, the base station can grasp the channel information for the UE # 1.

5 is an example of transmitting aperiodic SRS via a DM-RS to which the present invention is applied.

Referring to FIG. 5, each of four UEs (UE # 1, UE # 2, UE # 3, UE # 4) has two symbols per subframe in resource regions (RBs) allocated from the base station for uplink data transmission. It is set to transmit DM-RS through.

In this case, UE # 1 uses four RBs 510 in the last symbol 515 of the first subframe 501 for periodic SRS transmission. Here, the resources allocated for the SRS may not coincide with the Physical Uplink Shared CHannel (PUSCH) resources allocated to each UE. Meanwhile, UE # 1 transmits SRS using a resource region 531 for DM-RS allocated for UE # 4 in a second subframe 502 for aperiodic SRS transmission.

In addition, in the case of using an orthogonal cover code (OCC), since orthogonality with other signals is maintained by the OCC, each UE transmits an aperiodic SRS while transmitting a DM-RS in a resource region allocated to the corresponding UE. It may be. This involves transmitting unused DM-RS code points in aperiodic SRS without precoding.

6 is a diagram for transmitting an aperiodic SRS in the PUSCH region to which the present invention is applied.

Referring to FIG. 6, the SRS symbol 630 may be transmitted by puncturing the first symbol region of the PUSCH region in one subframe 601. That is, SRS transmission is performed using the PUSCH region 610 which is an area other than the symbol position 620 of the DM-RS. In this case, it is preferable to puncture pure data except for a position where control data necessary for transmission is transmitted in the PUSCH region.

As described above with reference to FIGS. 4, 5, and 6, the present invention can adjust the SRS transmission aperiodically, thereby increasing scheduling flexibility of the SRS, and thereby improving SRS capacity. Can provide an effect. However, inefficient problems may arise in actual resource management, which is as follows.

More specifically, although the non-periodic SRS method of FIG. 4 has the advantage of enabling channel estimation in a short time, there is a restriction that one-shot SRS should be sent only in a subframe in which periodic SRS is not set. That is, there is a constraint that the scheduler should schedule the transmission time of the one-shot SRS while avoiding collision. When srsSubframeConfigration is 0 in Table 1, when there is a cell configured to transmit SRS in every subframe, the UE always transmits periodic SRS every subframe, that is, through one-shot There may be a constraint that the periodic SRS cannot be transmitted. That is, several ms subframes should be avoided with respect to the periodic SRS in order to transmit the one-shot SRS. Thus, when a resource other than the subframe in which the periodic SRS is transmitted is used, similar to the case of transmitting the SRS using the PUSCH, Cherishing is necessary.

On the other hand, when transmitting aperiodic SRS using the DM-RS symbol of FIG. 5, there is an advantage in that collision with other UEs can be avoided. However, even if the layer of a single user multiple input multiple output (SU-MIMO) is at least two or the multiple user multiple input multiple output (MU-MIMO) uses the OCC, each layer for a different layer or multiple UE may be used. There is a disadvantage that the distinction between OCCs is impossible between each other, so that the effect of using OCC is virtually ineffective.

In addition, in case of transmitting the aperiodic SRS using the partial region of the PUSCH of FIG. 6, there is an advantage in that a resource other than the existing SRS may be utilized and transmitted without collision with the existing SRS, but due to puncturing for the PUSCH data region The disadvantage is that data loss occurs. Accordingly, in the case of using the PUSCH region, a low code rate may be obtained using an MCS field of a frequency band in which data recovery through puncturing may be performed, that is, a Downlink Control Information (DCI) format 0 received from a base station. By applying a coding rate or lowering a modulation order, a restriction may occur that puncturing should be performed in a frequency region where decoding is good. In addition, when the SRS is transmitted in bursts for a certain period (Burst SRS), as the SRS transmission has a tendency of other periodic SRSs, it is difficult to properly support aperiodic SRS transmission according to an embodiment of the present invention. .

For example, when UEs use four antennas, four times more SRS resources are required than UEs using one antenna, and thus, UEs using the four antennas may not provide sufficient SRS resources. . Accordingly, in order to maximize resource efficiency of aperiodic SRS transmission for a UE using four antennas, it is necessary to satisfy the following conditions with respect to aperiodic SRS transmission.

i) Actively use resources other than the resources allocated by the transmission of the existing SRS, ii) It should be possible to obtain channel information in a short time by transmitting in one shot (time of one subframe) or short enough time, iii) The number of blind decoding of the existing PDCCH should not be increased, and iv) the data loss of the PUSCH should be minimized.

In this regard, the present specification looks at ways to improve the performance of the aperiodic SRS to suit the network situation. In the present specification, in the wireless communication system, a control signal for estimating the state of resources, in particular, an aperiodic transmission method of the SRS, and also a state of the radio channel and the UE so that the transmission of the SRS is performed within a short time in the entire bandwidth. Accordingly, the present invention provides a method for efficiently transmitting and receiving an aperiodic control signal, and in particular, a method for instructing to avoid a collision between the aperiodic control signal and another signal.

For example, the method of using a DM-RS symbol during the aperiodic SRS transmission may transmit SRS using one antenna and may not consume PUSCH resources while using resources other than the SRS resource region. However, the method of using the position of the DM-RS symbol may exist in the constraint that the UE should be a SU-MIMO and also a UE below Layer 1 or Layer 2, although it is possible to transmit the SRS using OCC. . Therefore, in one embodiment of the present specification, the SRS using the DM-RS is transmitted only in the maximum frequency band capable of sending the SRS using the DM-RS, and the PUSCH region or the existing SRS symbol region using puncturing are used in the remaining bands. A method of transmitting aperiodic SRS in a combination scheme is presented.

FIG. 7 illustrates a case in which an aperiodic SRS is transmitted by combining an SRS using a DM-RS and an SRS using a PUSCH region according to an embodiment of the present specification.

Referring to FIG. 7, layer 1 represents a case of using one layer. In case two UEs are displayed in one frequency band, MU-MIMO is applied. An area indicated by 710 means a PUSCH area, and an area indicated by 720 means an area where a DM-RS is transmitted.

UE # 1, UE # 2, and UE # 3 use SU-MIMO of Layer 1. Accordingly, in a band allocated to UE # 1, # 2, and # 3, UE # 2 may send an SRS using DM-RS as in 750. This is because OCC can be used in the case of the band using SU-MIMO layer 1, and a plurality of UEs can transmit a signal. In other words, the present invention may enable the other UE to transmit the SRS by using the area where the DM-RS is transmitted, thereby enabling aperiodic transmission of the SRS.

On the other hand, for a band using layer 3 or more like UE # 6 or using MU-MIMO such as UE # 4 and UE # 5, it is difficult to distinguish signals transmitted by multiple UEs using OCC. This makes it difficult to transmit the SRS using the DM-RS region.

Therefore, only the bands used by UE # 1, UE # 2, and UE # 3 transmit the SRS using the DM-RS region as shown in 750 and the SRS using the PUSCH region as shown in 760 for the remaining bands. .

On the other hand, the instruction to transmit the SRS to the UE # 2 using the DM-RS region can be signaled using one bit of the remaining code points of the RA field of DCI format 0. Accordingly, it is possible to implicitly notify without increasing the number of blind decoding times of an uplink grant. In a similar manner, a method of adding one bit for semi-persistent scheduling (SPS) may be used. The signaling scheme for the SRS transmission indication may use DCI format 0 or a new DCI format.

Since the method of designating the BW for SRS transmission is larger than the resource unit for allocating the resource to the actual UE, the BW representation of the SRS resource can be represented with bits smaller than the bit information of the RA (Resource Allocation) that is used. Do. Therefore, it is possible to designate the BW for the SRS by using the code point remaining in the current DCI format 0. Here, using the code point means that if N bits are allocated to specific information, but the type of information actually used is less than ^2N , the value of the unused portion is used to indicate other information. For example, when 3 bits are allocated, but the information actually used is 0 to 6, new information may be allocated to code

points

7 and 8.

In other words, when a DCI format 0 is specified that specifies an SRS BW for an aperiodic SRS in order to prevent unnecessary PDCCHs from being increased for a UE to which resources are allocated every subframe without using an SPS, the UE transmits the actual data. After recognizing the resource allocation for the SRS rather than the resource allocation for the resource, the resource for the data may be applied using the resource allocated in the previous subframe as it is.

A process of using the DIC format 0 according to an embodiment of the present specification is as follows.

For example, 13 bits of information are required to indicate a resource in a 20 MHz (100 RB) band. Therefore, the RA field of DCI format 0 is defined with 13 bits.

Here, a code point may be applied to the RA field used through the 13 bits. That is, since the range of information used for resource allocation is 0 to 5049, the remaining code points (about 11 bits) from 5050 to 8191 can be used as information bits for SRS transmission. Since the minimum unit of the BW used for SRS transmission is 4RB, the BW designation required for SRS transmission is possible for the 100RB band with approximately 9 bits of information.

Accordingly, the present invention allows the SRS transmission to be controlled using code points (11 bits) remaining in the information bits used for the RA. Accordingly, when the UE checks the value of the received RA field and is equal to or greater than 5050, the UE may confirm that the value of the corresponding RA field is indication information indicating to transmit an aperiodic SRS. The information on the aperiodic SRS transmission is used as a value obtained by subtracting 5050 from the received bit information.

Meanwhile, the SRS may be transmitted using the PUSCH region as shown in 760 for the remaining BWs other than the BW in which the SRS using the DM-RS is transmitted. In case of using the PUSCH region, other UE # 4, UE # 5, UE # 6 of the band in which the SRS is transmitted should be informed to puncture or hold the corresponding symbols through signaling.

In this case, since a plurality of UEs must be signaled at the same time, notification can be made using DCI format 3 / 3A. For example, when a power control bit transmission method is used, an increase in PDCCH overhead may be prevented. In addition, when using DCI format 3 / 3A, puncturing or holding may be signaled for a UE scheduled for SPS. When the DCI format 0, that is, the uplink allocation, cannot be signaled to the SPS UE in every subframe, the signal is also semi-persistent using the DCI format 3 / 3A.

In other words, DCI format 0 may be used for puncturing or holding, which may increase the number of transmissions of the PDCCH than using the DCI format 3 / 3A, and may not signal the SPS UE. This exists.

However, when using DCI format 0, there is an advantage that aperiodic DM-RS SRS triggering and puncturing (holding) can be used as one signaling format. Therefore, the DCI format 0 can be instructed to puncture or hold a signal to a UE scheduled to transmit a signal in an area in which an aperiodic SRS is to be transmitted. In this case, the bit indicating puncturing (holding) may use the remaining code point of the RA field, and may transmit in an intrinsic manner using another field in DCI format 0. That is, when the remaining code point is used, information for puncturing or holding the corresponding PUSCH region at the same time as UL allocation can be transmitted to the corresponding UE without increasing the additional PDCCH.

Meanwhile, the present invention provides information indicating bandwidth designation for SRS transmission using the DM-RS region and puncturing or holding for a signal transmitted in the PUSCH region in one scheme (for example, DCI format 0). We propose a method of dividing the remaining code points of the RA field for transmission.

For example, in the case of 20 MHz (100 RB), 6000 to 7000 code points among the remaining code points 5050 to 8191 are used for triggering aperiodic SRS using DM-RS and for BW designation, and bits required for puncturing or holding Specific bits can be specified and used. For example, since “1111111111111” is currently used as the SPS, a format of a specific bit such as “1111111111110” may be used as a format of a specific bit for indicating puncturing or holding.

However, the code point splitting method has a disadvantage in that the data area cannot be allocated. In order to overcome this problem, changing the existing resource allocation (RA) in units of 1 RB and applying the RA in units of 2 RBs or as a plurality of units of RBs as necessary, the number of bits required for the RA is reduced, and the bits remaining accordingly It can be used as information indicating treatment or holding. Alternatively, there is an extra bit that always remains in PDCCH DCI format 0. One of the bits may be used as a puncturing information bit. For example, in the case of 20 MHz (100 RB), when RA is performed with 2 RB as the minimum unit, only 11 bits are required to represent all cases. Therefore, the most significant bit or the least significant bit remaining can be used as puncturing bit.

When puncturing a signal transmitted in a PUSCH region using DCI format 0, a code rate may be lowered or a modulation level may be reduced by using a Modulation and Coding Scheme (MCS) field of DCI format 0 so that a punctured symbol may be well recovered. By lowering the modulation order and transmitting the data stably, the signal received at the base station can be adjusted to restore well.

In another embodiment, when DCI format 0 is used, information indicating to implicitly puncture or hold may be transmitted while using an existing RA field of DCI format 0 as data resource allocation information. In this case, no overhead occurs in terms of signaling for puncturing or holding.

For example, in the case of 20 MHz (100 RB) as described above, when receiving the RA information corresponding to 11 bits from 5050 to 8290 while setting the minimum unit of the RA to 2 RB, the UE determines that the corresponding DCI format 0 is punctured or not. Recognize it in DCI format including holding information. In the case of using the 11-bit information, the resource is allocated to a bit rougher than the RA is designated as 13 bits, but since the resource is assigned and implemented in 11 bits only in one subframe in which an aperiodic SRS is transmitted, There is no big problem in this regard.

In this regard, FIG. 16 is a diagram illustrating puncturing or holding information using a 0 / 1A field of format 0 according to an embodiment of the present specification.

Referring to FIG. 16, the 0 / 1A field 1610 of DCI format 0 is an indicator field for distinguishing whether the DCI format to be transmitted is DCI format 0 or DCI format 1A. That is, the indicator determines whether the corresponding DCI format is uplink (format 0) or downlink (format 1A). Meanwhile, as puncturing or holding is used in aperiodic SRS transmission, that is, uplink, the present invention may use the DCI format 0 / 1A field 1610 as a field indicating puncturing or holding information.

Instead of the DCI format 0 / 1A field 1610 to indicate the puncturing or holding field, an aperiodic CQI field 1620 or a frequency hopping field 1630 may be used. The aperiodic CQI field 1620 is used when aperiodic CQI information is transmitted. Herein, if it is assumed that aperiodic SRS and aperiodic CQI are not transmitted at the same time, the puncturing or holding field may be indicated using the aperiodic CQI field. In addition, the frequency hopping field 1630 is a field indicating whether or not frequency hopping, and may indicate the puncturing or holding field using the frequency hopping field 1630 according to the present invention. This is because aperiodic SRS is performed in one subframe or a minimum subframe, so that aperiodic CQI or frequency hopping does not need to be performed in the subframe.

As another example, a filler bit may be used. The filler bit is a field used to equally size the DCI format 1A with the DCI format 1A. Since the filler bit is defined and used as 1 to 2 bits according to the BW size, the filler bit may be used as a puncturing or holding field for the aperiodic SRS. Thus, when the puncturing or holding information is set inherently in DCI format 1A, the minimum information necessary for uplink allocation can be transmitted through DCI format 0 without being damaged.

FIG. 8 illustrates a case in which aperiodic SRS is transmitted using a DM-RS region and an existing SRS region according to another embodiment of the present specification. That is, FIG. 8 illustrates a combination scheme using SRS transmission using a DM-RS region and periodic SRS symbols.

Referring to FIG. 8, at this time, when the corresponding subframe is a subframe set to periodic SRS, it is a periodic SRS symbol position, but when the subframe is not set to periodic SRS, it is the last symbol of the general PUSCH region. That is, each subframe may be divided into a subframe transmitting periodic SRS and a subframe not transmitting periodic SRS.

Since UE # 1, UE # 2, and UE # 3 use SU-MIMO of Layer 1, UE # 2 can transmit SRS using the DM-RS region as shown in 850 in the corresponding band. This is applied to the signal to be transmitted to the OCC described above to replace the description that the two UEs can transmit a signal in one band. In addition, for the band of UE # 6 using layer 3 or more, or the band using MU-MIMO such as UE # 4 and UE # 5, an area for transmitting an SRS symbol is used as shown in 860.

That is, FIG. 8 shows that the SRS is transmitted using the last symbol in one subframe, as shown in FIG. On the other hand, when using the SRS resources allocated for other terminals and resources allocated for other signals, because the collision of signals may occur between the UEs transmitting the SRS or puncture the SRS at a predetermined position to the corresponding UEs Or signal to hold. On the other hand, since the band of the blank area (blank) of Figure 7, 8 is not used, it can be used for SRS transmission without the need for signaling to indicate a separate puncturing or holding.

Whether to puncture a signal transmitted in a PUSCH region or puncture a signal transmitted in an existing SRS symbol position may be specified in advance through RRC signaling, or may be specified using a format of a specific bit of a code point remaining such as an SPS. For example, "1111111111110" may indicate puncturing or holding of a signal transmitted in a PUSCH region, and "1111111111100" may define a signal transmitted at an SRS symbol position as a format of a specific bit indicating puncturing or holding. .

On the other hand, when the aperiodic SRS transmission using the DM-RS region overlaps with the periodic SRS transmission, it may be controlled to selectively transmit the periodic SRS according to the channel situation, or may be controlled not to transmit. In this case, SRS transmission using the DM-RS region cannot be punctured in the middle in order to maintain continuity. This is because a sequence generation technique different from the conventional method is required to puncture the SRS transmission part using the DM-RS region.

9 is an example of signaling for indicating puncturing or holding of a PUSCH region / existing SRS symbol applied to another UE so that a specific UE transmits aperiodic SRS according to an embodiment of the present invention.

Referring to FIG. 9, multiple UEs are simultaneously controlled using DCI format 3 / 3A. In DCI format 3 / 3A, transmission power of PUSCH / PUCCH can be controlled using 1 or 2 bits (adjustment bits). have. Accordingly, according to the present invention, after sequentially arranging bits to be transmitted to a corresponding UE for puncturing or holding a specific symbol for SRS transmission, coding is performed so that only the corresponding UE can be recognized.

In other words, the base station may signal as shown in FIG. 9 to instruct the UE # 4, the UE # 5, and the UE # 6 to puncture or hold a signal to be transmitted simultaneously in the PUSCH region. Of course, puncturing or holding signaling may not be performed on a frequency band that is an unused empty region.

Accordingly, the plurality of UEs search all of the region of the PDCCH to which DCI format 3 / 3A is transmitted, find a field such as its own coding, and decode to recognize information about puncturing or holding. . Accordingly, another UE transmits aperiodic SRS in the punctured or held PUSCH region. In FIG. 9, A (n), B (n), and C (n) indicate arbitrary information and n-bit information having a length of one or more.

Referring to FIG. 10, the UE schedules UEs capable of SRS transmission through DM-RS when aperiodic SRS is needed by the scheduler. In order for the base station to transmit aperiodic SRS using the DM-RS at the base station, the UEs schedule regions for transmitting signals, as shown in FIG. 10, when scheduling only UEs using the SU-MIMO layer 1 as shown in FIG. 10. OCC can be used for. Accordingly, when using the OCC, the aperiodic SRS 1050 via the DM-RS 1020 region is possible for the entire bandwidth of FIG. 10. In other words, aperiodic one-shot SRS using DM-RS is possible. In this case, the non-periodic one-shot SRS using the DM-RS may be possible even if the combination technique is not presented herein. Therefore, it may be another technique that satisfies the condition of the aperiodic SRS described above.

Referring to FIG. 11, a periodic SRS scheduled for UE 2 to transmit an aperiodic SRS is transmitted as it is, such as 1130 and 1140, and transmits an SRS using a DM-RS region such as 1110 and 1120 for a portion of the remaining bandwidth. That's the way it is.

In this case, unlike in FIG. 10, the SRS cannot be transmitted in a one shot method, but channel sounding can be performed within a sufficiently short time of the two subframes 1101 and 1102 as shown in FIG. 11, and DM-RS decoding of UE 2 is performed. In this case, since the portion which causes interference is eliminated, performance improvement can be obtained.

FIG. 12 is a diagram illustrating a process of instructing to avoid collision with aperiodic transmission or aperiodic transmission of a control signal according to an embodiment of the present specification.

In FIG. 12, a base station instructs a first UE transmitting an aperiodic SRS to transmit an aperiodic SRS, and transmits a DM-RS transmission area / PUSCH area / periodic SRS signal overlapping the aperiodic SRS transmission area of the first UE. The process of instructing the second or third UEs allocated the area to hold or puncture the transmission of a signal is shown.

Here, the second UE transmits a DM-RS signal or transmits a signal through a PUSCH channel in a DM-RS transmission area, a PUSCH area, or a transmission area of a periodic SRS, which is an area overlapping an area in which the aperiodic SRS is transmitted. Or a device that transmits a periodic SRS signal. The third UE is a device for transmitting a demodulation reference signal in a demodulation reference signal region, which is an area overlapped with the region where the aperiodic SRS is transmitted, and can be applied to the third UE because the OCC can be applied to the transmission of the DM-RS. Instruction information is not transmitted.

Referring to FIG. 12, the base station determines whether the first UE transmits an aperiodic SRS signal during the frequency band and time allocated to the second UE (S1210). This includes determining that a particular UE transmits aperiodic SRS in one shot in one subframe or in one shot in two subframes.

In operation S1220, the indication information indicating the first UE to transmit the SRS signal is generated during the determined frequency band and time. The indication information may be transmitted in various ways. For example, the indication information may be transmitted using a DCI format or in the form of information indicating or indicating frequency band and time information allocated to the other terminal through a data area of another channel. Of course, the transmission of the aperiodic sounding reference signal in DCI format 0 may be indicated using the code point.

On the other hand, since the area in which the SRS signal is to be transmitted by the first UE includes an area allocated to the second UE and the third UE, not the first UE, the base station allocates the time allocated to the second UE. In operation S1230, indication information indicating puncturing or holding of the signal transmission of the second UE is generated. Since the third UE is a UE that transmits a demodulation reference signal and is distinguished through OCC, no separate indication information is transmitted, but the transmission region of the aperiodic reference signal overlaps the transmission region of the PUSCH or the periodic sounding reference signal. In the case of 2 UE, an S1230 process is required. Instruction information indicating puncturing or holding of a signal may be generated.

The base station transmits the indication information to the first UE and the second UE (S1240). Here, the indication information is the first indication information to be indicated to the first UE and the second indication information to be indicated to the second UE, which may be transmitted separately and separately from each other, or may be transmitted in separate transmission schemes, respectively. have. All of these indication information may be transmitted through a physical channel. As described above, the first indication information is transmitted using a code point of an RA field of DCI format 0, and the second indication information is DCI format 3 /. Can be transmitted using the power control bits of 3A.

Thereafter, the base station receives the aperiodic control signal transmitted from the first UE for the predetermined time in the frequency bands allocated to the second UE and the third UE (S1250).

In more detail, the aperiodic SRS transmission time of the first UE may be scheduled to overlap with a time point at which the third UE transmits a demodulation reference signal, that is, a DM-RS.

For example, as shown in FIG. 7, the frequency band includes a frequency band allocated to a second UE, and the time is when the third UE transmits a signal including data, that is, when data of a PUSCH is transmitted. This can be This may apply when the third UE is UE # 1, # 2, # 3 of FIG. 7, and the second UE is UE # 4, # 5, # 6 of FIG. 7.

Of course, as shown in FIG. 8, the frequency band includes a frequency band allocated to a second UE, and the time may be a time point at which the second UE transmits a periodic control signal, that is, an SRS. This may apply when the third UE is UE # 1, # 2, # 3 of FIG. 8 and the second UE is UE # 4, # 5, # 6 of FIG.

In addition, as shown in FIG. 10 or FIG. 11, a plurality of UEs (UE # 1, # 2, # 3, # 4, # 5) may use the time for transmitting the DM-RS. As shown in FIG. 10, UE # 2, the UE, may transmit aperiodic SRS in a frequency region allocated to a plurality of UEs (UE # 1, # 3, # 4, # 5) within one subframe. As shown in 11, the UE may proceed to transmit an aperiodic SRS within two subframes. In this case, although a plurality of UEs (UE # 1, # 3, # 4, # 5) corresponds to any one of the second UE or the third UE, since the plurality of UEs all transmit DM-RS, a separate signal There is no need to hold or puncture.

That is, in FIG. 11, UE # 2 transmits aperiodic SRS in a frequency band and time point allocated to transmit DM-RS to UE # 3, # 4, and # 5 in a first subframe, and UE # 1 in a second subframe. UE # 2 may transmit an aperiodic SRS in a frequency band and a time point allocated to transmit a DM-RS at.

FIG. 13 is a diagram illustrating a process of receiving indication information instructing to avoid aperiodic transmission and collision of a control signal according to an embodiment of the present specification.

FIG. 13 illustrates a process of transmitting a signal or holding and puncturing a signal when one UE becomes the first UE, the second UE, or the third UE of FIG. 12. If the UE is to transmit aperiodic SRS, the UE receives indication information indicating that the aperiodic SRS is transmitted for a predetermined frequency band and time. On the other hand, a UE assigned to a DM-RS transmission area / PUSCH area / periodic SRS signal transmission area overlapping with an aperiodic SRS transmission area of another UE may receive indication information indicating to hold or puncture a transmission of a signal. do.

In more detail, as a process for aperiodic SRS transmission of the UE, the UE receives indication information from the base station (S1310). When the UE determines that the indication information indicates to transmit the aperiodic sounding reference signal for a predetermined frequency band and time (S1320), the UE transmits the aperiodic SRS signal for the defined frequency band and time (S1330). Information indicative of the transmission of the aperiodic sounding reference signal may be transmitted in various ways. For example, the indication information may be transmitted using a DCI format or in the form of information indicating or indicating frequency band and time information allocated to the other terminal through a data area of another channel. Of course, as described above, transmission of an aperiodic sounding reference signal in DCI format 0 may be indicated by using a code point.

On the other hand, when the indication information does not instruct to transmit the aperiodic sounding reference signal for a predetermined frequency band and time in S1320, that is, the indication information punctures the signal transmission for a predetermined time in the previously allocated frequency band. Or check if it is instructed to hold. According to an embodiment, when instructing to puncture or hold a signal transmission in a previously allocated PUSCH region or a transmission region of a periodic sounding reference signal, the UE transmits an SRS signal for a predetermined time according to the puncturing or holding indication information. Puncture or hold the transmission of the signal (S1340). That is, the SRS may be aperiodically transmitted or punctured or held according to the type of indication information received by the UE.

In more detail, when it is necessary to transmit the SRS aperiodically in the entire frequency band, the UE proceeds to steps S1320 and S1330.

On the other hand, since the UE transmits the SRS aperiodically in all frequency bands, other UEs using some of the entire frequency bands provide a signal for a predetermined time as indicated by the indication information in order to avoid signal collision. It can be punctured or held.

In this case, the signal punctured or held in operation S1340 may be a data signal in the PUSCH in FIG. 7, or may be a signal such as a periodic SRS as in FIG. 8.

14 is a diagram illustrating an apparatus for instructing to avoid a collision with aperiodic transmission or aperiodic transmission of a control signal according to an embodiment of the present specification.

The apparatus of FIG. 14 includes a determiner 1410, an indication information generator 1420, a coding unit 1430, and a transceiver 1440.

The determiner 1410 determines that the first UE transmits the aperiodic SRS signal during the frequency band and time allocated to the second UE. More specifically, the determiner 1410 determines the transmission region of the aperiodic sounding signal of the first UE and transmits the demodulation reference signal of the second UE overlapping the transmission region, the PUSCH region or the periodic sounding reference signal. Determine the transmission area of.

The indication information generation unit 1420 punctures or holds the indication information indicating that the first UE can transmit the SRS signal in the determined frequency band and time and the signal transmission during the time to the second UE. Generates indicating instruction information. The indication information to be transmitted to the first UE and the indication information to be transmitted to the second UE may be generated differently or may be generated in different processes. That is, the generation of the indication information does not necessarily require to proceed at the same time, but may be performed in the same or separate process.

In other words, the indication information generation unit 1420 determines a transmission area of a demodulation reference signal of a third UE overlapping the transmission area, and instructs the first UE to transmit a sounding reference signal in the transmission area. Generating first indication information and second indication information instructing puncturing or holding a signal when the second UE transmits a signal in the PUSCH region or the transmission region of the periodic sounding reference signal.

The coding unit 1430 generates a radio signal including the indication information. Of course, the coding unit 1430 generates wireless signals with the indication information, respectively.

The transceiver 1440 transmits the generated first and second indication information to the first and second UEs, respectively, and receives an aperiodic sounding reference signal in the transmission area from the first UE.

Here, the determination unit 1410 may determine the time when the third UE transmits a demodulation reference signal in determining the time. In more detail, referring to the case of FIG. 7, the frequency band is determined to include a frequency band allocated to a second UE, and the time is determined to include a time point at which the second UE transmits a signal including data. Can be. For example, as shown in FIG. 7, the frequency band includes a frequency band allocated to a second UE, and the time is when the second UE transmits a signal including data, that is, when data of a PUSCH is transmitted. It may include. This may apply when the third UE is UE # 1, # 2, # 3 of FIG. 7, and the second UE is UE # 4, # 5, # 6 of FIG. 7.

In addition, as shown in FIG. 10 or FIG. 11, a plurality of UEs (UE # 1, # 2, # 3, # 4, # 5) may use the time for transmitting the DM-RS. As shown in FIG. 10, UE # 2, which is a UE, may transmit aperiodic SRS in a frequency region allocated to a plurality of UEs (UE # 1, # 3, # 4, # 5) in one subframe. In this case, although a plurality of UEs (UE # 1, # 3, # 4, # 5) corresponds to any one of the second UE or the third UE, since the plurality of UEs all transmit DM-RS, a separate signal There is no need to hold or puncture.

FIG. 15 is a diagram illustrating a configuration of an apparatus for receiving indication information instructing to avoid aperiodic transmission and collision of a control signal according to an embodiment of the present specification.

Referring to FIG. 15, an indication information extractor 1510, an SRS signal generator 1520, and a transceiver 1530 are configured.

The transceiver 1530 receives a radio signal from a base station. The instruction information extracting unit 1510 extracts the instruction information from the radio signal received from the transceiver unit 1530, and indicates that the instruction information transmits an aperiodic sounding reference signal for a predetermined frequency band and time. Whether it is indication information or second indication information indicating puncturing or holding a signal in a PUSCH region or a transmission region of a periodic sounding reference signal.

When the transceiver 1530 instructs to transmit the SRS aperiodically according to the type of the received indication information or to puncture or hold the signal transmission for a predetermined time in a previously allocated frequency band, For example, when instructing to puncture or hold a signal in a PUSCH region or a transmission region of a periodic sounding reference signal, the corresponding signal may be punctured or held during the time.

When it is necessary to transmit aperiodically, the SRS signal generator 1520 generates an SRS signal to be aperiodically transmitted during the frequency band and the time.

On the other hand, since the UE transmits the SRS aperiodically in all frequency bands, another UE using some of the entire frequency bands performs signal transmission for a predetermined time as indicated by the indication information in order to avoid collisions. It can be treated or held. One embodiment of the transmission of the other signal may be a demodulation reference signal, may be a signal including data in a PUSCH, or may be a periodic SRS.

In the present specification, by transmitting the aperiodic SRS, it is possible to efficiently transmit the channel state of the UE to the base station.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

CROSS-REFERENCE TO RELATED APPLICATIONCROSS-REFERENCE TO RELATED APPLICATION

This patent application is related to the patent application No. 10-2010-0041595 filed in Korea on May 3, 2010 and the patent application No. 10-2010-0041827 filed in Korea on May 4, 2010. (a) Claims priority under section 35 USC § 119 (a), all of which are hereby incorporated by reference in this patent application. In addition, if this patent application claims priority for the same reason as above for a country other than the United States, all the contents thereof are incorporated into this patent application by reference.

Claims

The base station overlaps the first transmission region, the first transmission region of the aperiodic sounding signal of the first user terminal, and the second user terminal transmits a demodulation reference signal, transmits data, or transmits a periodic sounding reference signal. Determining a second transmission area, and a third transmission area overlapping the first transmission area and transmitting a demodulation reference signal by a third user terminal;

Generating first indication information instructing the first user terminal to transmit an aperiodic sounding reference signal in the first transmission area;

Generating second indication information instructing the second user terminal to puncture or hold the signal when transmitting a signal including data or a periodic sounding reference signal in the second transmission area;

Transmitting the first indication information to the first user terminal and transmitting the second indication information to the second user terminal; And

And receiving an aperiodic sounding reference signal in the first transmission area from the first user terminal.
The method of claim 1

The first indication information and the second indication information are transmitted through a physical channel,

The first indication information is transmitted using a code point other than the code point used for resource allocation of a resource allocation (RA) field defined for resource allocation in downlink control information (DCI) format 0. The indication information is transmitted using a power control bit of DCI format 3 / 3A, the aperiodic reception method of the sounding reference signal.
The method of claim 2, wherein the second indication information,

Is transmitted using a code point other than the code point used for resource allocation of the RA field of DCI format 0, or

An indicator field for identifying a format of the DCI format 0, a field indicating aperiodic channel state information (CQI), a field indicating whether to frequency hopping, and a filler bit added to match a size with another DCI format And transmitting the data using at least one of the fields.
The method of claim 2, wherein the second indication information,

And puncturing or holding the second or third user terminal at the same time by using the power control bits of the DCI format 3 / 3A.
Receiving, by the user terminal, indication information from the base station; And

When the indication information is first indication information indicating to transmit an aperiodic sounding reference signal for a predetermined frequency band and time, the aperiodic sounding reference signal is transmitted for the frequency band and the time, and the indication information Puncturing or holding the signal, if the second indication information indicates puncturing or holding a signal containing data or a periodic sounding reference signal, the method of aperiodic transmission of the sounding reference signal.
The method of claim 5

The first indication information and the second indication information are received via an information physical channel,

The first indication information is received using a code point other than a code point used for resource allocation of a resource allocation (RA) field defined for resource allocation in downlink control information (DCI) format 0, and the second The indication information is received using a power control bit of DCI format 3 / 3A, characterized in that the aperiodic transmission method of the sounding reference signal.
The method of claim 6, wherein the second indication information,

Is received using a code point other than the code point used for resource allocation of the RA field of DCI format 0, or

An indicator field for identifying a format of the DCI format 0, a field indicating aperiodic channel state information (CQI), a field indicating whether to frequency hopping, and a filler bit added to match a size with another DCI format And receiving by using at least one of the fields.
The method of claim 6, wherein the second indication information,

And puncturing or holding at the same time by using power control bits of the DCI format 3 / 3A.
The base station overlaps the first transmission region, the first transmission region of the aperiodic sounding signal of the first user terminal, and the second user terminal transmits a demodulation reference signal, transmits data, or transmits a periodic sounding reference signal. A determination unit which determines a second transmission area to be made, and a third transmission area which is overlapped with the first transmission area and in which a third user terminal transmits a demodulation reference signal;

Generate first indication information instructing the first user terminal to transmit an aperiodic sounding reference signal in the first transmission area, and generate a signal or periodic sound that includes data in the second transmission area to the second user terminal An instruction information generator for generating second instruction information for instructing to puncture or hold the signal when transmitting the ding reference signal; And

Transmit the first indication information to the first user terminal, transmit the second indication information to the second user terminal, and receive an aperiodic sounding reference signal in the first transmission area from the first user terminal. An aperiodic reception device for a sounding reference signal, comprising a transmitting and receiving unit.
The method of claim 9

The first indication information and the second indication information are transmitted through a physical channel,

The first indication information is transmitted using a code point other than the code point used for resource allocation of a resource allocation (RA) field defined for resource allocation in downlink control information (DCI) format 0. And the indication information is transmitted by using the power control bits of the DCI format 3 / 3A.
The method of claim 10, wherein the second indication information,

Is transmitted using a code point other than the code point used for resource allocation of the RA field of DCI format 0, or

An indicator field for identifying a format of the DCI format 0, a field indicating aperiodic channel state information (CQI), a field indicating whether to frequency hopping, and a filler bit added to match a size with another DCI format A device for aperiodic reception of the sounding reference signal, characterized in that it further comprises transmitting using at least one of the fields.
The method of claim 10, wherein the second indication information,

And puncturing or holding the second or third user terminal at the same time by using the power control bits of the DCI format 3 / 3A.
A transceiver for receiving a radio signal from a base station by a user terminal;

A first instruction information indicating to transmit an aperiodic sounding reference signal for a predetermined frequency band and time in the received radio signal, or a means for puncturing or holding a signal including data or a periodic sounding reference signal An instruction information extraction unit for extracting instruction information; And

If the indication information extracted by the indication information extracting unit is the first indication information, includes a non-periodic sounding signal generator for generating an aperiodic sounding reference signal to be transmitted during the frequency band and the time,

The transmission / reception unit transmits the generated aperiodic sounding reference signal when the indication information is the first indication information. When the indication information is the second indication information, the transceiver transmits a signal including data or a periodic sounding reference signal. Apparatus for aperiodic transmission of a sounding reference signal, characterized in that it is processed or held.
The method of claim 13

The first indication information and the second indication information are received through a physical channel,

The first indication information is received using a code point other than a code point used for resource allocation of a resource allocation (RA) field defined for resource allocation in downlink control information (DCI) format 0, and the second And the indication information is received using a power control bit of DCI format 3 / 3A.
The method of claim 14, wherein the second indication information,

Is received using a code point other than the code point used for resource allocation of the RA field of DCI format 0, or

An indicator field for identifying a format of the DCI format 0, a field indicating aperiodic channel state information (CQI), a field indicating whether to frequency hopping, and a filler bit added to match a size with another DCI format The apparatus for aperiodic transmission of the sounding reference signal, characterized in that it further comprises being received using at least one of the fields.
The method of claim 14, wherein the second indication information,

And puncturing or holding simultaneously by using the power control bits of the DCI format 3 / 3A.